['strɑ:təm, 'strei-]
stratum
n. 地层,阶层

词形变化:

形容词:stratal 名词复数:strata

例句与用法:

  1. A sharp ridge with steeply sloping sides, produced by erosion of the broken edges of highly tilted strata.
    豚脊丘,陡峻的山脊由于对高斜层破碎山背的侵蚀而形成的陡峭的山背
  2. A problem that cuts across all strata of society
    一个影响到一切社会阶层的问题。

英英解释:

名词 stratum:

  1. one of several parallel layers of material arranged one on top of another (such as a layer of tissue or cells in an organism or a layer of sedimentary rock)
  2. an abstract place usually conceived as having depth
  3. 同义词:level, layer